Ch 16-20 Electronics Review: Inductance, Resonance, and Diodes

Counter Electromotive Force (CEMF)

Induced voltage in AC circuits, out of phase by 180 degrees with applied voltage

Inductive Reactance

Opposition to current flow in AC circuits, measured in ohms

XL

Formula for inductive reactance: XL = 2πfL

Impedance

Combined effect of resistance and reactance, used to calculate current

Apparent Power

Product of Erms and Irms, includes reactive power

Power Factor

Ratio of true power to apparent power

Resonance Circuits

Combination of resistive, capacitive, and inductive circuits at equal reactances

Vector Graph

Representation of voltage using arrows and angles to show magnitude and phase

Isolation Transformer

Transformer with equal windings on both primary and secondary coils

Semiconductor

Materials like silicon, germanium between insulators and conductors

Doping

Process of adding impurities to a semiconductor to alter its properties

PN Junction Diodes

Diodes created by joining P and N materials, allowing current flow in one direction

Barrier Voltage

Voltage required to extract electrons in a PN junction diode

Forward Bias

Bias that allows current flow through a diode

Reverse Bias

Bias that restricts current flow through a diode

Negative Temperature Coefficient

Property where resistance of a material decreases with increasing temperature

Grown Junction

Diode construction method where semiconductor and P-type material are melted together

Alloyed Junction

Diode construction method where trivalent material is fused with a semiconductor crystal

Diffused Junction

Diode construction method where doping material is exposed to N or P type material in a gaseous state